June 2016 - Bitafal

2nd #interCILA RETRANSMISSION IN CITEVI

In a constant commitment to link up with the Latin American community ibero road construction, it is that Bitafal Group approached a group of classroom assistants, 2nd interCILA issued via streaming from Madrid - Spain.

Given the interest shown in Ibero-Latin American Congress of Asphalt (IBWC) held every two years, it is that this intermediate activity to follow up the same thought.

Among the actors involved is the Spanish Association of Manufacturers of Asphalt Mixtures (ASEFMA) and the Ibero-Latin American Asphalt Association (AILA) who organized the #interCILA 2.0 as a meeting on asphalt paving a fundamental support in digital technologies that allow rebroadcast live via streaming.

This time the technical institute ITAFEC It was responsible for the online completion of the 2nd #interCILA 2.0. It began with the presentation of the best technical communications XVIII CILA by Spanish engineers María del Mar Colas and José Luis Peña and ended with the audiovisual summary of the best presentations of the congress Iberolatinoamericano Reviewed by Ing. Francisco José Lucas, Dr. Adrián Nosetti Argentine engineer and Ing.Marcelo Ramirez.

With nearly 10 million impressions worldwide via twitter, a duration of approximately 5 hours, a fluid communication is maintained through social networks and can connect the activity in Madrid with various supporters through online streaming streaming . It is estimated that about 350,000 people gained access to some content on it.

They approached the Note ASEFMA with data on the number of participants, tweets most talked about and other relevant information on the interaction of users with streaming technology and via twitter.

SEVEN RECOMMENDATIONS FOR USE OF EMULSIONS IN WINTER

21 June 2016
in: Emulsion,modified emulsions,Bitafal group,winter,News,technology

When they start to shorten the days and appear the first cold start problems with the use of emulsions. This situation is repeated year after year and often turns into a spiral of construction problems that last for months if the corresponding precautions are not taken.

Being a recurring theme which we have learned to solve these years, we bring our 7 recommendations regarding the selection of products and ways of implementation to work in cold weather conditions.

While asphaltic emulsions have minimal restrictions on use in winter, since moisture of the aggregate is not counterproductive, if it is imperative that the embodiment in winter is different from the traditional, to avoid problems of detachment during execution and prevent exudates which cause in the first warm days of spring and every year we complained.

Las emulsiones catiónicas cortan por desbalance de cargas eléctricas y no es selectivo de verano o invierno, así que SIEMPRE cortan. Luego del corte existen diversos procesos dentro de la emulsión como coalescencia y curado, en el cual el agua de la emulsión debe evaporar para lograr la cohesión necesaria del asfalto residual con la piedra y así evitar desprendimientos prematuros.

Said above it is evident that the moisture retained in the system due to the low evaporation during winter, the aggregate / asphalt affinity is less. Subject usually solved from the viewpoint of performance as long as the maximum temperatures are above 10 ° C, otherwise it is not advisable to use emulsions until maximal exceed that temperature.

1) IMPROVE THE RESISTANCE OF THE MATRIX OF ARIDAchieve the stone is held in place by mechanical locking means.

When working on granular bases, use a heavy cylinder for driving the aggregate in the base and thus prevent detachment traffic. These solutions have drawbacks because if the stone is not large enough gaps may be affected and when summer comes the binder has nowhere to expand and asphalt appears on the surface. But if you plan to make a second irrigation or sealed future.

* If simple treatment, can be made the same in two passes with half the components in each pass, making the initial half containing emulsion below and above and the second irrigation achieved get into the gaps of the first giving a stone matrix closed using a heavy compactor.

* In case of a double treatment, perform the two executions on the same day to achieve the same closed die from the outset.

2) START very early: You must run risks in the winter mornings, once that blunts the sun. Recall that the emulsions cut by decompensation loads and we need all available hours of evaporation.

3) terminate PAST PERFORMANCE NOON: Watering must be discontinued after noon for a time sufficient evaporation in the last application so that when night came, the system achieves sufficient to withstand uncontrolled traffic cohesion.

4) heat more EMULSIONS: Si el problema es el agua retenida en el sistema luego del corte, podemos ayudar al proceso de curado si calentamos la emulsión entre 80 y 95°C para que el agua evapore mas rápidamente. Con las actuales emulsiones de RIEGO de BITAFAL no hay inconvenientes de escurrimiento debido a las altas viscosidades de las mismas incluso a temperaturas de 95°C. Además al ser en base a agua no existen riegos de incendio o explosión como si existe con el uso de diluidos.

5) AVOID AGGREGATES DIRTY: This recommendation is for all types of surface treatment but when the weather is good, you can moisten a dirty arid for the emulsion works well. That is not the case in winter where we seek to reduce the amount of water in the middle. With a dirty arid the emulsion will only adhere to dust causing peeling even if it is fully cured. (Especially if it is very hot)

6) ENABLE TRAFFICKING AND CONTROLLED EARLY FORM: Controllably release traffic (maximum speed 30 km / h) once finished the compaction in the early hours of the afternoon. There if we need the air traffic for the purpose of purging the system drops of water released from the residual asphalt and aggregates collaborate to lock each watering done.

7) USE OF EMULSIONS SUITABLE TO SITUATION: SPECIAL BITAFAL ASFALTOS emulsions prepared with different hardnesses of the waste and with different degrees of modification. Please find attached our table recommendations by type of work to be done, the area of the country and the time of year.

LIMITATIONS these recommendations:

Although it is possible to work during cold periods we not recommend performing work during the winter if:

1) highest temperatures all day do not exceed 10 ° C.

2) monogranular Treatments applied on hard surfaces such as concrete or asphalt layers and where traffic speed is greater than 75 km / h.

3) Surface treatments applied on very soft bases without adequate granulometry, as silts the coast, where a burial arid irrigation A occurs, reducing gaps and subsequent exudation.

TECHNICAL CONFERENCE Asphalt Mixtures - COARCO -

The BITAFAL Group was present at the R & D Technical Conference on new asphalt mixtures by the company COARCO from Argentina. It was held at the plant in Moreno, Province of Buenos Aires, on 25 April. Uruguay took part members of MTOP and LATU and Argentina participated leaders of National and Provincial Roads Authority, representatives from various dealers and other suppliers from the nearby shore.

During the conference the latest equipment were both laboratory mix design and workmanship, laying and compaction. mixtures of high RAP, colored mixtures, mixtures of batching and until a new asphalt scented low level of VOC emissions used were developed.

The sessions began with a visit to the company's state-of-the-art laboratory, where they have invested in high-level equipment for research and development. To list some of the equipment, they have an ignition oven to determine asphalt content, a gyratory compactor for mix design, a Wheel Tracking Test according to the new European regulations with a plate compactor, a unit to determine the dynamic modulus of mixes and a 4 point fatigue team.

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As for the laying and compaction equipment they have Vögele pavers and compactors next generation Hamm oscillatory system with GPS compaction optimization.

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FIRST TRANCHE OF ASPHALT RUBBER ON DOMESTIC ROUTES

Last Friday, June 3 the first flight of recoating was performed with BITAFLEX AMC 50, modified asphalt tire dust on Route 9 along with Techint SACI. A stretch of about 1300 m on the road more was performed, near km 202 at the entrance of the city of Rocha.

This is another milestone in the development of technology in Uruguay after the success of the first stage of testing performed in 2009 at the entrance to our industrial plant.

The BITAFAL GROUP always at the forefront of new technologies, has developed a modified crumb rubber asphalt having performance characteristics similar against permanent deformation to a AM3. To ensure the quality and homogeneity of the product, we have built a specific plant for manufacturing BITAFLEX AMC 50 mixers with high power.

Since last December governing Decree 358/2015issued by the National Directorate of Environment (MVOTMA) in which tire producers and importers must take over the management of tires once their useful life. One of the most sustainable alternatives to recycle them is the modification of asphalt.

Already there have been several advances in Uruguay, as the presentation of Management Plans (El Pais, 06/13/2016), The opening of the first floor grinding used tires

(MAKING ROADS # 73 - May 2016) And performance of the first test section (REPORT CITEVI)

This time a semi-dense mixture was made in a thin layer to surface layer (CAC S 12), the thickness of 40 mm provided. Stability values and design empty% were similar to those made with AM3.

In construction, fabrication, laying and compaction of the mixture was held at the same temperatures that were being made with AM3, with the advantage of better workability in work could be seen as technical.

We will report on the performance of this segment in future editions of the newsletter.

Monthly ArchivesJune 2016 - Bitafal

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